It means: something is familiar to you, but you cannot remember exactly what.
What does the idiom "It rings a bell" mean?
Paris
What is the capital city of France?
Shakespeare.
Who is the English writer who wrote plays like: Romeo and Juliet or Othello?
Terrifying
What is the word used for a feeling of extreme fear?
Ice
What is created when water freezes?
What is the solid form of water known as?
On the tip of your tongue.
What idiom do you use to say that you know a word, but cannot remember it right now.
The capital city of Poland.
Where is Warsaw?
Queen Elizabeth II
Who was the last female monarch of Great Britain?
The kind of ancient buildings where kings and queens used to live.
What is a castle?
Oxygen.
What element do we need to breathe?
What element is needed for photosynthesis?
Once in a blue moon.
What idiom do you use when you want to say something doesn't happen very often?
Madrid.
What is the capital city of Spain?
It is the highest mountain on earth, it is part of the Himalayas.
What is Mount Everest known for?
A centenarian
What is the word for a person who is over 100 years old?
This is what keeps us on the ground and not floating up into space.
What is the purpose of gravity?
It means something is very expensive.
What does the idiom: "it costs an arm and a leg" mean?
The capital city of England.
Where is London?
A country surrounded by a city.
What geographical feature make The Vatican City special.
This is the activity where you take pictures with camera equipment and develop them.
What is photography?
He was known for coming up with "the theory of relativity".
What is Albert Einstein most known for?